Author Question: If an object's acceleration is positive, its speed must be increasing. Indicate whether the ... (Read 75 times)

P68T · **on:** Jul 28, 2018

If an object's acceleration is positive, its speed must be increasing.
Indicate whether the statement is true or false

Question 2

French physicist Hippolyte Fizeau set up an experiment where he sent light through the gaps in the teeth of a rotating gear to a distant mirror, as shown in this figure. He measured the speed of the light when it bounced back from the mirror. If you performed a similar experiment, what value would you get for the speed of light if the distance to the mirror was 50 meters and you estimated that it took light 3 10-7 seconds to travel that distance and return? (See page 349 of your textbook for more on this experiment.)
a. 6.6 108 meters/second.
b. 3.3 108 meters/second.
c. 1.7 108 meters/second.
d. 3.0 108 meters/second.
e. 2.997 108 meters/second.

kusterl · **Reply #1 on:** Jul 28, 2018

Answer to Question 1

F
It could have a negative velocity that is getting less negative, which corresponds to a decreasing speed.

Answer to Question 2

b